/*
 * Copyright (C) 2017  Andrew Gunnerson <andrewgunnerson@gmail.com>
 *
 * This file is part of DualBootPatcher
 *
 * DualBootPatcher is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * DualBootPatcher is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with DualBootPatcher.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "mbcommon/error.h"

#include <type_traits>

#include <cerrno>

#ifdef _WIN32
#include <windows.h>
#endif

namespace mb
{

ErrorRestorer::ErrorRestorer()
    : _saved_errno(errno)
#ifdef _WIN32
    , _saved_error(GetLastError())
#endif
{
#ifdef _WIN32
    // We don't include windows.h in the header
    static_assert(std::is_same_v<const DWORD, decltype(_saved_error)>,
                  "Unexpected type for DWORD");
#endif
}

ErrorRestorer::~ErrorRestorer()
{
    errno = _saved_errno;
#ifdef _WIN32
    SetLastError(_saved_error);
#endif
}

}
